Glutamine Synthetase-Glutamate Synthase Pathway and Glutamate Dehydrogenase Play Distinct Roles in the Sink-Source Nitrogen Cycle in Tobacco1 From: Plant Physiology | Date: February 1, 2006| Author: Masclaux-Daubresse, Cà © line; Reisdorf-Cren, Michà ¨ le; Pageau, Karine; Lelandais, Maud; Et al | Copyright American Society of Plant Physiologists Feb 2006. Provided by ProQuest LLC.Copyright information

Glutamate (Glu) metabolism and amino acid translocation were investigated in the young and old leaves of tobacco (Nicotiana tabacum L. cv Xanthi) using [^sup 15^N]ammonium and [2-^sup 15^N]Glu tracers. Regardless of leaf age, [^sup 15^N]ammonium assimilation occurred via glutamine synthetase (GS; EC 6.1.1.3) and Glu synthase (ferredoxin [Fd]-GOGAT; EC 1.4.7.1; NADH-GOGAT; EC 1.4.1.14), both in the light and darkness, and it did not depend on Glu dehydrogenase (GDH; EC 1.4.1.2). The [^sup 15^N...

Related newspaper, magazine, and journal articles from HighBeam Research

	Nitrification in a Vertisol subsoil and its relationship to the accumulation of ammonium-nitrogen at depth. Australian Journal of Soil Research ; Introduction Nitrogen is often one of the most limiting nutrients for plant growth, and consequently, obtaining and maintaining sources of nitrogen in cropping systems is extremely important. On a Vertisol in south-east Queensland, high concentrations of exchangeable ammonium have been observed at
	Hypophagic effects of ammonium are greater when infused with propionate compared with acetate in lactating dairy cows The Journal of Nutrition ; Hypophagic Effects of Ammonium Are Greater When Infused with Propionate Compared with Acetate in Lactating Dairy Cows1,2 ABSTRACT The objective of this experiment was to determine interactions between hypophagic effects of propionate and ammonium in lactating dairy cows. Eight ruminally cannulated
	EC Extends Urea Anti-Dumping Measures.(European Commission)(Brief Article) Chemical Market Reporter ; THE EUROPEAN Commission (EC) has extended its anti-dumping measures on Russian and Polish fertilizer exporters for another five years. An EC investigation revealed that Russian and Polish fertilizer exporters have been dumping urea and urea ammonium nitrate (UAN) in Nafta countries while being
	EC approves duty-free CIS imports. (Commonwealth of Independent States chemical exports) Chemical Week ; Following the European Council of Ministers' decision to go along with the European Commission's proposals to bring the Commonwealth of Independent States (CIS) and Georgia under its Generalized System of Preferences (GSP) scheme for 1993, most chemical exports from the former Soviet republics can
	Nitrogen-Dependent Posttranscriptional Regulation of the Ammonium Transporter AtAMT1;1(1)[W][OA] Plant Physiology ; Ammonium transporter (AMT) proteins of the AMT family mediate the transport of ammonium across plasma membranes. To investigate whether AMTs are regulated at the posttranscriptional level, a gene construct consisting of the cauliflower mosaic virus 35S promoter driving the Arabidopsis (Arabidopsis

See all results.